Upgrade your charging system with a wide selection of Alternators for your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax. When you begin adding electrical accessories to your truck, the charging system can start lacking. Additional equipment such as auxiliary lighting, winches, and snowplows draw significantly more power than your factory charging system can support. In most cases, these alternators are a direct bolt-on and require no modifications for installation. They are designed to mount in the factory location utilizing the stock belt, and existing electrical connections. Upgraded high-output alternators are capable of providing significantly more amps than the stock units they replace. Be confident you can charge your vehicle no matter what its power requirements. Shop leading manufacturers such as Mean Green, XDP, and Leece-Neville today and provide a much needed boost to your charging and electrical system!